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A. B. WO'ODBURY, OF ASHUELOT, N EW HAMPSHIRE.

Letters -Patent No. 68,541, dated September 3, 1867.

IMPROVEMEN T IN SPINNING-JACK.

TO ALL WHOM IT MAY CONCERN:

Beit known that I, A. B. WOODBURY, of Ashuclot, in the county of Cheshire, and State of New Hampshire, have invented a new and useful Improvement in Spinning-Jack; and do hereby declare that the following is a full, clear, and exact description thereof, which will enable othersskilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a back end view of a spinning-jack showing'my improvements.

Figure 2 is a 'vertical section taken in'the plane of the line :c z, tig. 1.

Figure 3 isa partial top view.

Similar letters of reference indicate like parts.

This invention relates to a new and useful improvement in spinning-jacks, and consists in devides to be attached to a; common spinning-jack, which shall compel the spinner to draw the jack but the full distance to the bumpers, as hereinafter described.

Either through neglect or design it is a common fault for operatives to fail in drawing out their jacks therequired distance, and when this important duty is not attended to the yarn is unevenly twisted, to the great detriment of the cloth made of it, and damage to lthe manufacturer. By my improvement the spinner. is compelled to draw the'jack out the required distance under the penaltyof having his ends twisted of. y The yarn is, therefore, all spun perfectlyeven, of equal size and weight. The device is provided with lock andkey under the control of the manager, so that the operative, when ,disposed to cheat, cannot tamper with it or alter the arrangement so as to interfere with. the operation of the-jack.

The drawings represent an ordinary spinningfjack, and only the improvements of my invention and the parts connected therewith are' specially referred to and herein described.

- A is the frame, B the driving-pulley, and a a the fast and loose pulleys on the same shaft b, which carries also the end pulley c, belted to the upper pulley d on one end of the shaft e, lto give motion to a Worm, g, on the other end, which works in a worm-wheel, 7i, called thetwist-gear, which alternately engages and disengages withA the worm 'g, as the vcr-tical slide-bar z' moves upor down in the usual way. Ch'represents the jack or traversing carriage, connected by a cord, j with the pulleys k and 7c in the front'hand back partl of the machine respectively, as usual. On the cord 7' is fastened a stop-spool, m, which strikes against a long uprightlev'enn,

when the jack is drawn back full to the bumpers to act upon the lever, as hereinafter described.

The principal feature of my invention consists in the constructionand operation of a spring-pin, n, on the twist gear-wheel h, instead of the ordinary fixed and projecting pin for regulating the traverse movement ofthe jack, by tripping acateh, p, which holds the slide-bar z', to shift the driving-pulley and reverse the motion of thejack. My improved movable pin 1t is provided with a spiral spring, as seen in the drawings, which bears it out on the front side of the twist gear-wheel h, so that the end on the inner side of the gear shall not project far enough to strike in the'trip-catch p until the'jack is drawn back the required distance by means of a cap cover, q, placed over the face of the gear-wheel h, which capbears upon the head of the pin n', when the spool- .stop-m, on the cord j, strikes the foot of the lever Z, and thus forces in the cap cover g, which is attached to the upper end of the lever l. The cap cover q is hinged to the lever Z, to be removed from over the twist-gear h by the manager of the mill as desired, and is secured over the twist-gear h by lock and key, asshown in the drawings. It will be seen that when the carriage or jack C is not drawn back .to the bumpers r, the spool-stop m will not strike and operate on the lever Z to press the pin 'n through the gear-wheel L, in which ease the gear t will pass the catchp without striking it to trip thesliding-bar t', and change the motion of the jack, but when the jack is drawn full back to the bumpers r, then the spool-stop m strikes the lover l, and forces the pin at through the twist gear-wheel L, so that it will strike the catch p, and thus shift the pulleys to change the motion in the ordinary manner of that operation. The spiral spring on the pin n is compressed by the pressure of the cap cover q, when itpushes the pin n forward, but when the pressure is relieved by the release of the lever l, as the spool-stop m travels away. from it again, then the spiral spring on the pin n expands and draws the pin back again. The lever l is pivoted at s, and there are several minorconnections, not referred to, which may be y Inodied in variousways, and are' not essential to my invention, which will be understood without further description of details, or of'the'operation' of the well-known spinning-jack.

es, S41 2 Having thus described my invention, what I claim :is new, and desire tosecure by Letters Patent, is-

1. The movable pin n., provided with :L spring, in combination with theitwist gear-Wheel z, arranged and operating substantially as and for the purposes hereindescribed.l

2. The cap Cover g, connected `with the lever Z, in combination with the movable pin n in the twistgearrL, the stop c on the cord'j, and the jack C, arranged and operating substantially as and for the purposes herein set forth. s

f A. B. WOODBURY. Witnesses: v

A.` PETTENGILL,` Jr., A. H. WooDBURY. 

